>Description:
>USB developer utilities:
>usbctl
>        Dump information about devices on a USB bus.

# usbctl
usbctl: USB_DISCOVER: Invalid argument

?

>usbdebug
>        Set the kernel debugging flag.

# usbdebug 1
usbdebug: USB_SETDEBUG: Invalid argument

>usbgen
>        Dump descriptors of a generic device.
>        usbgen -f ugenN -v -D

N/A; these are not ugens.

>usbstats
>        Gives statistics for a USB host contrller.
>

That seems to work, anyway.  :)

Do I need some kernel support?

-s